[gtk+] Statusbar: add 'statusbar' style class

[Lapo Calamandrei <lapo src gnome org>]

commit 4aca13e39e2b1cd2ccfd8aa9dc5c11b5d9e36baf
Author: Lapo Calamandrei <calamandrei gmail com>
Date:   Tue Nov 11 17:23:04 2014 +0100

    Statusbar: add 'statusbar' style class

 docs/reference/gtk/gtk3-sections.txt |    1 +
 gtk/gtkstatusbar.c                   |    4 ++++
 gtk/gtkstylecontext.h                |   11 +++++++++++
 3 files changed, 16 insertions(+), 0 deletions(-)
---
diff --git a/docs/reference/gtk/gtk3-sections.txt b/docs/reference/gtk/gtk3-sections.txt
index 9b3f52c..4543494 100644
--- a/docs/reference/gtk/gtk3-sections.txt
+++ b/docs/reference/gtk/gtk3-sections.txt
@@ -6046,6 +6046,7 @@ GTK_STYLE_CLASS_SIDEBAR
 GTK_STYLE_CLASS_SLIDER
 GTK_STYLE_CLASS_SPINBUTTON
 GTK_STYLE_CLASS_SPINNER
+GTK_STYLE_CLASS_STATUSBAR
 GTK_STYLE_CLASS_SUBTITLE
 GTK_STYLE_CLASS_SUGGESTED_ACTION
 GTK_STYLE_CLASS_TITLE
diff --git a/gtk/gtkstatusbar.c b/gtk/gtkstatusbar.c
index 18f974e..9cb3106 100644
--- a/gtk/gtkstatusbar.c
+++ b/gtk/gtkstatusbar.c
@@ -183,10 +183,14 @@ gtk_statusbar_init (GtkStatusbar *statusbar)
 {
   GtkStatusbarPrivate *priv;
   GtkShadowType shadow_type;
+  GtkStyleContext *context;
 
   statusbar->priv = gtk_statusbar_get_instance_private (statusbar);
   priv = statusbar->priv;
 
+  context = gtk_widget_get_style_context (GTK_WIDGET (statusbar));
+  gtk_style_context_add_class (context, GTK_STYLE_CLASS_STATUSBAR);
+
   priv->seq_context_id = 1;
   priv->seq_message_id = 1;
   priv->messages = NULL;
diff --git a/gtk/gtkstylecontext.h b/gtk/gtkstylecontext.h
index 8052a04..75930b8 100644
--- a/gtk/gtkstylecontext.h
+++ b/gtk/gtkstylecontext.h
@@ -355,6 +355,17 @@ struct _GtkStyleContextClass
 #define GTK_STYLE_CLASS_INLINE_TOOLBAR "inline-toolbar"
 
 /**
+ * GTK_STYLE_CLASS_STATUSBAR:
+ *
+ * A CSS class to match statusbars.
+ *
+ * This is used in #GtkStatusbar.
+ *
+ * Since: 3.16
+ */
+#define GTK_STYLE_CLASS_STATUSBAR "statusbar"
+
+/**
  * GTK_STYLE_CLASS_RADIO:
  *
  * A CSS class to match radio buttons.